scholarly journals Adsorption capacity of the corrosion products of nanoscale zerovalent iron for emerging contaminants

2020 ◽  
Vol 7 (12) ◽  
pp. 3773-3782
Author(s):  
Junmin Deng ◽  
Sungjun Bae ◽  
Sunho Yoon ◽  
Mathieu Pasturel ◽  
Rémi Marsac ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Emerging Contaminants ◽  
Corrosion Products ◽  
Zerovalent Iron ◽  
Secondary Minerals ◽  
Nanoscale Zerovalent Iron ◽  
Quinolone Antibiotics

Surface bound Fe(ii) on NZVI secondary minerals would affect the fate and mobility of quinolone antibiotics in the environment.

Removal of Arsenate from Aqueous Solution Using Nanoscale Iron Particles

2006 ◽  
Vol 41 (2) ◽  
pp. 210-215 ◽  
Author(s):  
Ching Yuan ◽  
Hsing-Lung Lien
Keyword(s):  
Adsorption Capacity ◽  
Zero Point ◽  
Xrd Analysis ◽  
Corrosion Products ◽  
Zerovalent Iron ◽  
Bet Surface Area ◽  
Maximum Adsorption Capacity ◽  
Iron Particles ◽  
Iron Corrosion ◽  
Nanoscale Iron Particles

Abstract Removal of As(V) using nanoscale iron particles was examined in batch reactors. Nanoscale iron particles, utilizing zerovalent iron with a diameter less than 100 nm as reactive materials, have been demonstrated to effectively remediate a wide variety of common environmental contaminants. In this study, characterization of nanoscale iron particles and their corrosion products was conducted using SEM-EDX, XRD, BET surface area analyzer and Laser Zee Meter. SEM-EDX results indicated adsorption of arsenic onto the iron surface, and XRD analysis found the formation of iron corrosion products including lepidocrocite, magnetite and/or maghemite at a reaction period of 7 d. Measurements of zeta potential revealed that the nanoscale iron particles have a zero point of charge at pH 4.4. Increasing adsorption amounts of arsenic with decreasing pH can therefore be attributed to the positive surface charge of the particles at lower pH. The maximum adsorption capacity of nanoscale iron particles determined by the Langmuir equation was about 38.2 mg/g. Normalization of the adsorption capacity to specific surface areas provides insight into the importance of iron types and the contact time of reactions in influencing arsenic uptake.

scholarly journals Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jien Ye ◽  
Yi Wang ◽  
Qiao Xu ◽  
Hanxin Wu ◽  
Jianhao Tong ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Removal Efficiency ◽  
Photoelectron Spectroscopy ◽  
Bimetallic Nanoparticles ◽  
Chemical Reduction ◽  
Particle Surface ◽  
Zerovalent Iron ◽  
Order Model ◽  
X Ray ◽  
Nanoscale Zerovalent Iron

AbstractPassivation of nanoscale zerovalent iron hinders its efficiency in water treatment, and loading another catalytic metal has been found to improve the efficiency significantly. In this study, Cu/Fe bimetallic nanoparticles were prepared by liquid-phase chemical reduction for removal of hexavalent chromium (Cr(VI)) from wastewater. Synthesized bimetallic nanoparticles were characterized by transmission electron microscopy, Brunauer–Emmet–Teller isotherm, and X-ray diffraction. The results showed that Cu loading can significantly enhance the removal efficiency of Cr(VI) by 29.3% to 84.0%, and the optimal Cu loading rate was 3% (wt%). The removal efficiency decreased with increasing initial pH and Cr(VI) concentration. The removal of Cr(VI) was better fitted by pseudo-second-order model than pseudo-first-order model. Thermodynamic analysis revealed that the Cr(VI) removal was spontaneous and endothermic, and the increase of reaction temperature facilitated the process. X-ray photoelectron spectroscopy (XPS) analysis indicated that Cr(VI) was completely reduced to Cr(III) and precipitated on the particle surface as hydroxylated Cr(OH)3 and CrxFe1−x(OH)3 coprecipitation. Our work could be beneficial for the application of iron-based nanomaterials in remediation of wastewater.

scholarly journals Effects of nitrate on the treatment of lead contaminated groundwater by nanoscale zerovalent iron

2014 ◽  
Vol 280 ◽  
pp. 504-513 ◽  
Author(s):  
Yiming Su ◽  
Adeyemi S. Adeleye ◽  
Xuefei Zhou ◽  
Chaomeng Dai ◽  
Weixian Zhang ◽  
...  
Keyword(s):  
Zerovalent Iron ◽  
Contaminated Groundwater ◽  
Nanoscale Zerovalent Iron

In vitro biocompatibility of nanoscale zerovalent iron particles (NZVI) synthesized using tea polyphenols

2010 ◽  
Vol 12 (1) ◽  
pp. 114-122 ◽  
Author(s):  
Mallikarjuna N. Nadagouda ◽  
Alicia B. Castle ◽  
Richard C. Murdock ◽  
Saber M. Hussain ◽  
Rajender S. Varma
Keyword(s):  
Tea Polyphenols ◽  
Zerovalent Iron ◽  
Iron Particles ◽  
Nanoscale Zerovalent Iron ◽  
In Vitro Biocompatibility

Removal of antimonite (Sb(iii)) and antimonate (Sb(v)) using zerovalent iron decorated functionalized carbon nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (98) ◽  
pp. 95865-95878 ◽  
Author(s):  
Shruti Mishra ◽  
Jaya Dwivedi ◽  
Amar Kumar ◽  
Nalini Sankararamakrishnan
Keyword(s):  
Carbon Nanotubes ◽  
Adsorption Capacity ◽  
Zerovalent Iron ◽  
Functionalized Carbon Nanotubes ◽  
Mechanism Of Interaction

Zerovalent iron decorated CNTs exhibited excellent adsorption capacity towards both Sb(iii) and Sb(v). Using XPS, FTIR and Raman mechanism of interaction is postulated.

Removal of Lead by Nanoscale Zerovalent Iron in Surfacewater

InCIEC 2015 ◽  
2016 ◽  
pp. 63-71 ◽  
Author(s):  
Raja Hafizzuddin Raja Amir Iskandar ◽  
Jalina Kassim ◽  
Mohd Fozi Ali ◽  
Amnorzahira Amir
Keyword(s):  
Zerovalent Iron ◽  
Nanoscale Zerovalent Iron
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